Apparatus

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sensors Mode-S transponder

4401D1

ICAO 24-bit transponder address · allocated to Austria

Currently assigned to OE-IND · AIRBUS A-320

Hex
4401D1
Octal
21000721
Decimal
4,456,913
Country
AT
Tail
OE-IND
Type
A320
No current signal · last broadcast 6h ago
Flights observed
509
Distinct callsigns
20
Country
AT
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 4401D1.

Country allocation

The ICAO 24-bit address 4401D1 falls within the block assigned to Austria (AT) by ICAO Annex 10, Volume III. Every aircraft registered in Austria receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
EJU42HR - 10 2026-05-24
EJU39WK - 10 2026-05-24
EJU37UW - 7 2026-05-24
EJU61EM - 6 2026-05-24
EJU92FL easyJet Europe 5 2026-05-18
EJU72CD easyJet Europe 5 2026-05-18
EJU62PT easyJet Europe 5 2026-05-18
EJU629M - 5 2026-06-19
EJU12AZ easyJet Europe 5 2026-05-18
EJU93PD easyJet Europe 4 2026-05-21
EJU86XD easyJet Europe 4 2026-05-20
EJU75FW easyJet Europe 4 2026-06-08
EJU69JX easyJet Europe 4 2026-04-21
EJU695G - 4 2026-06-24
EJU65DQ - 4 2026-06-21
EJU59TE easyJet Europe 4 2026-05-18
EJU59GF easyJet Europe 4 2026-05-18
EJU329N easyJet Europe 4 2026-06-22
EJU18AV - 4 2026-05-21
EJU134H - 4 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 EJU63AG - Jul 14, 17:10 UTCJul 14, 18:10 UTC1h 0m
2026-07-14 EJU84ZE - Jul 14, 16:20 UTCJul 14, 16:40 UTC20m
2026-07-14 EJU84ZE - Jul 14, 15:15 UTCJul 14, 16:15 UTC1h 0m
2026-07-13 EJU92XV - Jul 13, 19:50 UTCJul 13, 21:55 UTC2h 5m
2026-07-13 EJU38UD - Jul 13, 17:10 UTCJul 13, 19:05 UTC1h 55m
2026-07-13 EJU72PQ - Jul 13, 14:10 UTCJul 13, 16:10 UTC2h 0m
2026-07-13 EJU51TY - Jul 13, 10:50 UTCJul 13, 12:55 UTC2h 5m
2026-07-13 EJU87DG - Jul 13, 07:40 UTCJul 13, 09:25 UTC1h 45m
2026-07-13 EJU61VB - Jul 13, 05:20 UTCJul 13, 06:35 UTC1h 15m
2026-07-12 EJU42YB - Jul 12, 20:30 UTCJul 12, 22:25 UTC1h 55m
2026-07-12 EJU64GE - Jul 12, 17:30 UTCJul 12, 19:35 UTC2h 5m
2026-07-12 EJU16UP - Jul 12, 14:50 UTCJul 12, 16:10 UTC1h 20m
2026-07-12 EJU93WQ PMI → GVA Jul 12, 12:40 UTCJul 12, 13:55 UTC1h 15m
2026-07-12 EJU32EY - Jul 12, 08:45 UTCJul 12, 11:10 UTC2h 25m
2026-07-12 EJU65NU - Jul 12, 05:20 UTCJul 12, 07:40 UTC2h 20m
2026-07-11 EJU87TH - Jul 11, 20:45 UTCJul 11, 22:15 UTC1h 30m
2026-07-11 EJU75FG - Jul 11, 18:00 UTCJul 11, 19:35 UTC1h 35m
2026-07-11 EJU93RP - Jul 11, 14:45 UTCJul 11, 16:10 UTC1h 25m
2026-07-11 EJU16TM - Jul 11, 11:45 UTCJul 11, 12:45 UTC1h 0m
2026-07-11 EJU83WD - Jul 11, 09:25 UTCJul 11, 10:40 UTC1h 15m
2026-07-11 EJU51VN - Jul 11, 07:30 UTCJul 11, 08:25 UTC55m
2026-07-11 EJU18KE - Jul 11, 05:25 UTCJul 11, 06:20 UTC55m
2026-07-10 EJU98ZA HAM → MXP Jul 10, 21:20 UTCJul 10, 22:40 UTC1h 20m
2026-07-10 EJU68CA MXP → HAM Jul 10, 18:50 UTCJul 10, 20:20 UTC1h 30m
2026-07-10 EJU65XF - Jul 10, 16:55 UTCJul 10, 17:45 UTC50m
2026-07-10 EJU804D - Jul 10, 14:15 UTCJul 10, 15:15 UTC1h 0m
2026-07-10 EJU62WR SVQ → MXP Jul 10, 10:45 UTCJul 10, 12:50 UTC2h 5m
2026-07-10 EJU81EB MXP → SVQ Jul 10, 06:40 UTCJul 10, 09:00 UTC2h 20m
2026-07-09 EJU92EJ - Jul 9, 22:50 UTCJul 10, 00:25 UTC1h 35m
2026-07-09 EJU907T - Jul 9, 20:30 UTCJul 9, 21:50 UTC1h 20m
2026-07-09 EJU3722 - Jul 9, 18:05 UTCJul 9, 19:35 UTC1h 30m
2026-07-09 EJU3721 - Jul 9, 15:30 UTCJul 9, 16:55 UTC1h 25m
2026-07-09 EJU58KQ - Jul 9, 12:20 UTCJul 9, 13:40 UTC1h 20m
2026-07-09 EJU79PK - Jul 9, 10:15 UTCJul 9, 11:25 UTC1h 10m
2026-07-09 EJU14UQ - Jul 9, 07:40 UTCJul 9, 08:55 UTC1h 15m
2026-07-09 EJU421X - Jul 9, 05:15 UTCJul 9, 06:35 UTC1h 20m
2026-07-08 EJU35FN PMO → MXP Jul 8, 22:05 UTCJul 8, 23:40 UTC1h 35m
2026-07-08 EJU896H MXP → PMO Jul 8, 18:45 UTCJul 8, 20:00 UTC1h 15m
2026-07-07 EJU64CX - Jul 7, 18:15 UTCJul 7, 19:50 UTC1h 35m
2026-07-07 EJU56NB - Jul 7, 15:50 UTCJul 7, 17:20 UTC1h 30m
2026-07-07 EJU54TH - Jul 7, 12:05 UTCJul 7, 14:45 UTC2h 40m
2026-07-07 EJU64UV - Jul 7, 06:05 UTCJul 7, 08:40 UTC2h 35m
2026-07-06 EJU64CX - Jul 6, 18:45 UTCJul 6, 20:10 UTC1h 25m
2026-07-06 EJU56NB - Jul 6, 16:05 UTCJul 6, 17:25 UTC1h 20m
2026-07-06 EJU18NT - Jul 6, 11:40 UTCJul 6, 14:25 UTC2h 45m
2026-07-06 EJU62VP MXP → SSH Jul 6, 05:20 UTCJul 6, 11:35 UTC6h 15m
2026-07-06 EJU67TU - Jul 6, 00:50 UTCJul 6, 03:20 UTC2h 30m
2026-07-05 EJU87YT - Jul 5, 21:45 UTCJul 5, 23:50 UTC2h 5m
2026-07-05 EJU37CM FUE → MXP Jul 5, 13:00 UTCJul 5, 16:35 UTC3h 35m
2026-07-05 EJU62KL - Jul 5, 05:25 UTCJul 5, 09:10 UTC3h 45m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the OE-IND page for operator, model, and routing details .

Mode-S 4401D1 frequently asked

What is Mode-S code 4401D1?
4401D1 is an ICAO 24-bit transponder address. Allocated to Austria. Assigned to OE-IND.
Where is Mode-S 4401D1 registered?
Mode-S code 4401D1 is allocated to Austria (AT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4401D1 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4401D1, octal 21000721, decimal 4,456,913.
What flights does 4401D1 operate?
Mode-S 4401D1 has broadcast 20 distinct callsigns, including EJU42HR, EJU39WK, EJU37UW, EJU61EM, EJU92FL.